| 摘要 |
PROBLEM TO BE SOLVED: To suppress spark discharge between contacts by eliminating insufficient contact gap that occurs when a breaker is made compact and increasing the speed of a breaking operation.SOLUTION: A breaker includes first and second conductors 1 and 2 each having a terminal exposed to the outside and first and second conduct parts 12 and 22 that contact a PTC thermistor 5, a movable arm 3 for electrically connecting the first and second conductors 1 and 2, and a thermally-actuated element 4 which interrupts the breaker by inversion above the first contact part 12. The first contact part 12 has a protrusion which comes into contact with the top face 5a of the PTC thermistor 5, bulges toward the thermally-actuated element 4, and comes into contact with the thermally-actuated element 4 while the breaker is interrupted. |
